RU2329150C2 - Distributing device for liquid substances - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention is related to distributing device for liquid substances, which is used in particular, if not exclusively, as monochrome section for printing machines that are used for printing implementation on continuous material in the form of cloth. Distributing device contains reservoir with liquid substance, anilox roll and cut roll, on which cut jacket is movably installed, at that reservoir, anilox roll and cut roll are made with the possibility of movement to roll, on which cloth material is moving. Mentioned distributing device has operator side and transition side, at that anilox roll and cut roll are supported by corresponding supports on the side of operator and transition side. Also distributing device includes unit of cut roll blocking in console position, when corresponding cut jacket should be replaced, at that mentioned device is connected to support on side of cut roll transition. Support on side of operator of cut roll consists of the first and second elements that are made with the possibility of automatic displacement from cut roll and back, and these elements in working configuration retain roll on operator's side, and in configuration of cut jacket replacement they are spaced from each other, separating cut roll operator's side. At that mentioned second element of support on side of cut roll operator is connected to corresponding actuating mechanism, which controls its displacement from cut roll axis and back. Mentioned second element of cut roll support on operator's side forms thrust for distributing device, when the latter mover forward to mentioned transition roll.

EFFECT: fast and easy replacement of cut jackets.

10 cl, 12 dwg

Description

The present invention relates to a liquid distribution device, used, in particular, if not exclusively, as a monochromatic section for printing machines used to print on continuous web-shaped material, such as tissue paper for the production of paper rolls of kitchen towels, paper napkins, scarves, toilet paper and similar products.

It is known that printing machines used to perform printing of the aforementioned type, also called flexographic printing machines, comprise a drum around which the web passes and at least one cliche roller on which the ink is distributed and from which this ink is transferred onto the web on which you want to print. In order to achieve the distribution of paint on the cliché roller, a device is used, commonly referred to as the “one-color section”, comprising a paint reservoir or “colorful box”, a dispensing roller or “anilox roller” that receives ink from the reservoir and transfers it to the cliché roller by contact , and two doctor blades or doctor blade located and acting between the ink box and the anilox roller.

Figure 1 schematically shows a typical flexographic printing press with four monochromatic sections. In this diagram, the symbol (RI) denotes the transfer roller, where the web (N) goes, to which it is necessary to print and which moves in the direction of the arrow (Z), the symbols (C), (D) and (E) indicate three guide rollers for webs (N) located in the production chain in front of the roller (RI), symbols (F) and (G) denote two guide rollers for webs (N) located in the production chain in front of the roller (RI), symbols (H), (L ), (P) and (Q) denote four identical monochromatic sections symmetrically located around the roller (RI), the symbol (CD) is visible indicates an anilox roller, the symbol (CL) indicates a cliche roller, the symbols (LS) and (LI) indicate two squeegees located and operating between the ink box (U) and the anilox roller (CD), the symbol (S) indicates the supporting structure of the squeegees (LS , LI). Both squeegees, interacting with the structure (S) and the surface of the anilox roller (CD), limit the ink box (U), which contains the paint for this roller (CD). The two opposite bases of the ink box (U) are covered with suitable tight plates or gaskets. The symbol (M) indicates the direction of rotation of the roller (RI). The cliche roller is formed by a cylindrical body with a smooth surface on which the cover is movably mounted, equipped with reliefs, the effect of which is the formation of drawings and inscriptions that need to be printed. Thus, to change the printing effects, it is enough to remove the cover from the aforementioned roller and replace it with another cover, hereinafter referred to as the "cliche cover". This operation concerns mainly all monochromatic sections of the printing press. The latter is stopped during the replacement of cliche cases, with a loss of performance, the greater the longer the time required for replacement. To replace a cliche case, it is necessary that the operator remove the roller support using at least partially hand tools; this takes time, the greater, the less qualified the operator, and this can cause a risk of damage to parts that are removed and then installed again. The same disadvantages are associated with dispensers, used, for example, to distribute glue or other liquid substances to web-shaped materials in motion and arranged similarly to the aforementioned monochromatic sections, which are equipped with a roller on which the cover is movably mounted (also called the “cover” in this case cliche ”, since it is equipped with reliefs suitable for ensuring the distribution of matter only at predetermined points of the canvas, and not over its entire surface), and a distribution roller, obtaining the substance from the corresponding reservoir and due to the contact transferring this substance to the cliché roller.

Switchgears are described in patents US6615716, EP741009 and EP596244.

The main objective of the present invention is to develop a switchgear, in particular a monochromatic section for a printing press, made in order to reduce and facilitate the replacement of cliche cases.

According to the invention, this result is achieved by creating a switchgear having the characteristics mentioned in paragraph 1 of the claims. Additional specifications are provided in the dependent clauses.

The present invention makes it possible to substantially reduce the time required to replace cliché covers, with a corresponding reduction in productivity losses due to machine stopping; this advantage is all the more obvious the greater the number of switchgears involved in this operation. In addition, the device according to the present invention is relatively simple to manufacture, it is simpler and safer to use, and is also reliable after prolonged use.

A person skilled in the art will best understand these and other advantages and characteristics of the invention by reading the following description and referring to the accompanying drawings, which are given as an illustration of a practical embodiment of the invention and which should not be construed in a limiting sense, while:

figure 1 schematically shows a typical flexographic printing press with four monochromatic sections;

figure 2 presents a schematic view similar to that shown in figure 1, but related to a machine equipped with four monochromatic sections according to the present invention;

figure 3 presents a schematic cross-section of the supports of the cliche roller or roller monochromatic section according to the invention;

figure 4 presents a schematic cross-section of the supports of the anilox roller or roller monochromatic section according to the invention;

figure 5 presents a schematic cross-section of a monochromatic section according to the invention, viewed from the side of the operator, and when placing the entire remaining part of the cliché roller on the corresponding support on the side of the operator;

figure 6 presents a cross section similar to that shown in figure 5, but said support is shown in the disconnected position;

figure 7 presents a cross section similar to that shown in figure 5, but the monochromatic section is viewed from the side of the transmission;

on Fig presents a cross section similar to that shown in Fig.6, but monochromatic section is viewed from the side of the transmission;

figure 9 presents a schematic partial perspective view of the machine shown in figure 2, in the working layout, with some parts removed for better presentation of others;

figure 10 presents a view similar to that shown in figure 9, with the supports of the rollers of the monochromatic section in a layout that allows the removal of the cover cliché;

figure 11 presents a simplified block diagram of a control system for actuators;

on Fig presents on an enlarged scale the part shown in figure 5.

The term "operator side" means the side from which the operator can remove the cliche cover from the corresponding roller and replace it with another cliche cover. The term "transmission side" means the opposite side of the machine, that is, the side according to which the motors are arranged to serve the rotation of the cliché rollers or rollers and the anilox rollers or rollers. As stated above, the term “roller” or “roller” means a cylindrical body with a smooth or substantially smooth surface on which a tubular cover provided with reliefs can be mounted. The aforementioned tubular case will be referred to as a “cliche case” (regardless of whether the substance to be dispensed is paint or something else).

The accompanying drawings (Figs. 2-12) show a printing machine with four monochromatic sections (1) located symmetrically around the transfer roller (2) for the web (3) on which printing is being performed. The present machine is also provided with a series of guide rollers (4) for the web (3), said guide rollers being located in the process chain in front of and after the roller (2), said rollers (4) being connected to a fixed structure (5) that serves it also supports the roller (2) and supports, through the corresponding brackets (6), the single-color sections (1).

Each one-color section (1) is located on the corresponding bracket (6) of the structure (5) and contains a paint reservoir (7) or a “colorful box”, anilox roller (8) and cliche roller (9), which are located next to the transfer roller ( 2), so that the web (3) on which to print, is between the cliche roller and the transfer roller. As in standard systems, the anilox roller (8) and cliché roller (9) are connected to the corresponding electric motors (10, 11) that rotate them around the corresponding longitudinal axes; said axes are parallel to each other and to the axis of rotation of the transfer roller (2). The cliche roller (9) is a roller of the type formed by a cylindrical body with a smooth or substantially smooth surface on which the cliche cover (18) is mounted. Anilox roller (8) receives paint from the ink box (7) and transfers it by contact to the cliché roller (9), which, in turn, prints on the web (3) moving along the transfer roller (2). Anilox roller (8) and cliché roller (9) have corresponding shafts or axes (12, 13), extending to both the operator side and the transmission side of the machine. The said shafts (12, 13) are located on the respective bearings - (14, 15) on the operator side and (16, 17) on the transmission side - mounted on the respective brackets (6). More specifically, the shaft (12) of the anilox roller (8) always lies on the respective supports (14) and (16), while the shaft (13) of the cliche roller (9) lies on both supports (15) and (17) only for printing operations: the said shaft (13) is locked in the “cantilever” position on the support (17) of the transmission side and is not fixed on the operator's side during removal and replacement of the corresponding cliche cover (18), which is explained in more detail below.

For locking the cliche (9) of the cliche in the cantilever position, for example, a piston (19) attached to the support (17) of this roller (9) on the transmission side can be used, while the piston rod is oriented radially relative to the shaft (13) and is configured to lock the sleeve (20) installed by means of a key in the rear portion of the shaft (13) of the roller (9), that is, installed by means of a key in that portion of the shaft (13) that is connected to the engine (11). When the piston rod (19) is extended, the shaft (13) is connected to the support (17), entering in such a way that part of the same shaft on the operator's side can be disconnected from the support (15), which makes it possible to replace the cover (18) . During operation or during printing, the piston rod (19) is retracted, as a result of which the shaft (13) is located on both respective bearings (15) and (17) and can freely rotate around its longitudinal axis.

Both the support (14) on the operator's side and the support (16) on the transmission side of the anilox roller (8) are movable on the bracket (6), being mounted on straight guides (21) that are parallel to each other, installed on the bracket (6), forming a single unit with it, perpendicular to the longitudinal axes of the ink box (7), anilox roller (8) and cliché roller (9), and the mentioned supports (14, 16) can be moved along these guides thanks to two corresponding screw to the regulators (22), each of which brought into engagement with the center of the base portion of the corresponding leg (14, 16) and driven by an electric motor (23). The rotation of the mentioned engines causes the bearings (14, 16) to come closer together, and then the anilox roller (8) to come closer to the cliché roller (9), and vice versa, their dilution. The mentioned engines (23) are mounted on the said structure (5), forming a single unit with it, and are located in accordance with its two heads (50, 51), while the engine (23) is located on the head (50) on the operator’s side, the other the engine (23) is located on the head (51) on the transmission side.

According to the invention, the cliche support (15) of the cliche on the operator side mainly contains two elements (150, 151), which in the normal operating configuration of the machine, that is, during printing, are brought closer to the roller (9), forming the corresponding support on which the shaft (13) of the roller (9) rotates freely around its longitudinal axis. In a configuration capable of removing the cliche cover (18) when the cliche roller (9) is in the cantilever position (i.e., connected by a piston (19) to the corresponding support (17) on the transmission side), the two elements (150, 151) are withdrawn from roller (9).

According to the embodiment shown in the accompanying drawings, the element (150) of said support (15) on the operator side is connected to the support (14) of the anilox roller (8) on the operator side and mounted to slide on the same guides (21), so that the movement of the support (14) determines the movement of the element (151). For example, the connection between the aforementioned element (150) and the support (14) of the anilox roller (8) on the operator side can be obtained by connecting, using two or more screws (88), a lateral rigid extension (33) of the element (150) with the support (14 ) so that the portion (89) of the connecting extension (33) is located in the corresponding receiving socket (346) formed in the support (14). Said extension (33) preferably has a tubular or cylindrical or prismatic shape, while the corresponding section (89) inside the support (14) has the shape of a flange, and the socket (346) of the support (14) in which the flange (89) is enclosed has - on the side facing the element (150), a closing frame (34) to prevent the flange (89) from falling out. The said frame (150) is attached to the support (14) by screws (87) and is in contact with the flange (89). More specifically, the frame (150) is in contact with the surface of the flange, which faces the outside of the socket (346), that is, faces the element (150). In the same socket (346) of the support (14), in which the said flange (89) of the side extension (33) of the element (150) is enclosed, there is a spring (345) located between the bottom (347) of the socket (346) and the extension (33) )

The screw (22), which drives the front support (14) of the anilox roller (8), is passed rotatably around its axis through the hole (155) of the element (150). The second movable element (151) of the front support (15) of the cliché roller (9) is connected to the corresponding electric motor (24) configured to bring said element into translational motion to and from the roller (9) by means of a corresponding screw (25).

The mentioned elements (150, 151) limit, as mentioned above, the front support (15) of the cliche (9), forming, by means of the corresponding concavities (156, 157) facing the same roller (9), two diametrically opposed supports for the front the end flange (90) of the cliché roller (9), wherein said flange (90) comprises a shaft bearing of the cliché roller (9). In other words, the front end of the roller (9) is provided with a flange (90), which during printing is located in the concavity (157) of the element (150), interacting with the element (151), which is in contact with the flange (90) on the diametrically opposite side (see figure 5). In contrast, in the configuration where the front end of the roller (9) is free, both elements (150, 151) are located away from the roller (9) (see FIG. 6). The distance between the element (151) and the flange (90) of the roller (9) is determined directly by the corresponding engine (24). The distance between the element (150) and the flange (90) of the roller (9) is determined by the reverse movement of the support (14), which is connected with it and which moves it together with itself under the control of the corresponding engine (23).

The support (16) on the transmission side of the anilox roller (8) is structurally identical to the support (14) on the operator side.

The support (17) on the transmission side of the cliche (9) of the cliche is made of one element with a tubular extension (170) facing the roller (9); said extension limits the seat for the corresponding part of the corresponding shaft (13) and for the said sleeve (20), which is pressed by the piston rod (19) when it is necessary to block the roller (9) in the cantilever position. On the side opposite to the said tubular extension (170), an engine housing (11) is installed, which drives the roller (9).

The said support (17) is connected to the corresponding electric motor (177) by means of a lead screw (178), in order to ensure the movement of the same support along the said guides (21), when it is necessary to take it away from the transfer roller (2), and to subsequently return it to working configuration.

The supports (16, 17) on the transmission side of the anilox roller (8) and the cliche roller (9) are equipped with a flexible stop (34 ') and a hard stop (33'), respectively. The mentioned supports (16) and (17) are not connected to each other, being independent of each other.

The screw (22) connecting the support (16) on the transmission side of the anilox roller (8) with the corresponding engine (23) is passed rotatably around its longitudinal axis through the corresponding hole (67) provided by the support (17) on the transmission side of the roller ( 9) cliche.

The colorful box (7) is also installed with the possibility of moving on the said guides (21), which ensures its access to the anilox roller (8) and its removal, when necessary, in accordance with the technology provided for monochromatic sections of standard printing machines.

Mentioned actuators (10, 11, 19, 23, 24, 177) are connected to a programmable electronic device (80) of the type that is known to specialists in industrial automation and for this reason is not described in detail. The electronic device (80) at the command of the operator automatically controls the movements described above, as well as described below.

To remove the cover (18) of the cliche from the roller (9) of the monochromatic section (1) in order to replace the removable cover with another in the stopped machine, the following occurs.

The device (80) activates the piston (19), which, acting on the sleeve (20) installed by means of a key on the shaft (13), blocks the latter in the cantilever position. Accompanying this operation, the device (80) activates the engines (23), which, by means of the screws (22), move the supports (14) and (16) of the anilox roller (8) back. The colorful box (7) moves back, pushed by the supports (14) and (16). Element (150) of the front support (15) of the cliché roller is moved by the front support (14) of the anilox roller (8), since it is associated with it. The support element (151) (15) is retracted from the roller (9) by means of a corresponding engine (24). The support (17) on the transmission side of the cliche (9) of the cliche is diverted from the transfer roller (2) by the corresponding engine (177). At this point, the end of the roller (9) on the operator’s side is released, and you can freely remove the cliche cover (18) and replace it (in a way that is known to technicians and therefore is not described in more detail here). To return the monochromatic section to the working configuration, the device (80) provides the implementation of the mentioned movements in the reverse order, and all the supports (14, 15, 16, 17) return to their original positions and positions, and then the piston (19) releases the shaft (13 ), which at this moment is located with the possibility of free rotation on the respective supports on the sides of the operator and transmission. The return of the support element (150) of the support (15) to the working configuration - after the engine (177) has returned the support (17) to the corresponding initial position - is determined by the advancement of the support (14), which pushes it to the roller (9) until until contact between the flange (90) of the latter and the element (151) is restored, the position of which determines the stop for the device, and in particular for the cliche roller (9) moving to the transfer roller (2). In the operating configuration, the flexible stop (34 ') of the support (16) is pressed against the lateral hard support (33') of the support (17), and the spring (345) contained in the support (14) is also compressed, thereby ensuring constant contact between the flange (90) the roller (9) and the element (151).

Although the previous description relates to monochromatic sections of printing presses, it is contemplated that the apparatus of the present invention can be effectively applied in cases where the substance to be applied is not a paint but a substance of a different type (i.e., adhesive, softening liquids or other substance), which should be applied at predetermined points or areas of the material in the form of a web, in particular a paper web, by means of a roller provided with a cliche cover movably mounted thereon, and the substance It is transferred to the cover by contact with the distribution roller, which receives the substance from the corresponding tank. In this case, instead of the paint, the reservoir will contain glue, emollients or another substance.

In practice, structural details, as far as the shape, size, arrangement of elements and the nature of the materials used, as well as its shape can be changed in any equivalent way, but without going beyond the scope of the proposed technical design, and therefore beyond the protection provided by this patent.

Claims (10)

1. A switchgear comprising a reservoir (7) containing a liquid substance, an anilox roller (8) and a cliché roller (9) onto which the cliché cover (18) is movably mounted, wherein the reservoir (7), an anilox roller (8) and the cliche roller (9) is arranged to move towards the roller (2) along which the material (3) moves in the form of a web to receive said substance, and from said roller, said switchgear having an operator side and a transmission side, said anilox roller (8) and mentioned in Alik (9) clichés are supported by appropriate supports (14, 15) on the operator side and (16, 17) on the transmission side, a device (19) for locking the cliché roller in the cantilever position, when the corresponding cliché cover (18) should be replaced, moreover said device is associated with a support (17) on the transmission side of the cliché roller (9), wherein the support (15) on the operator side of the cliché roller (9) contains the first and second elements (150, 151) configured to automatically move from the roller ( 9) a cliche and to it, and holding these elements in the working configuration roller (9) on the operator’s side, and in the replacement case configuration (18), the cliches are spaced apart, disconnecting the operator side of the roller (9) cliché, said second support element (151) on the operator side of the cliche (9) cliche the corresponding actuator (24) controlling its movement from the axis of the cliche (9) of the cliche and to it, characterized in that said second element (151) of the cliche support (15) of the cliche (9) forms a stop for the switchgear (1) ) when the latter moves forward to said gear cylinder (2). 2. The distribution device according to claim 1, characterized in that it is a monochromatic section for printing machines, and the substance contained in the said tank (7) is a paint. 3. A dispenser according to claim 1, characterized in that the substance contained in said reservoir (7) is an adhesive. 4. A dispensing device according to claim 1, characterized in that the substance contained in the said reservoir (7) is a softening liquid. 5. The switchgear according to claim 1, characterized in that said first element (150) of the support (15) on the cliche operator side (9) of the cliche is connected to the support (14) on the operator side of the anilox roller (8), while moving the support (14) causes the movement of the element (150). 6. A switchgear according to claim 5, characterized in that the connection between the first element (150) and the support (14) on the operator side of the anilox roller (8) is carried out by means of a side rigid extension (33) of the element (150), said extension connected to the support (14). 7. Switchgear according to claim 6, characterized in that flexible means (345) are inserted between the extension (33) of the first element (150) and the support (14) on the operator side of the anilox roller (8). 8. The distribution device according to claim 1, characterized in that the said first and second support elements (150, 151) on the operator side of the cliche roller (9) are located on opposite sides of the latter. 9. The distribution device according to claim 1, characterized in that the supports (16, 17) on the transmission side of the anilox roller (8) and the cliché roller (9) are equipped with a flexible stop (34 ′) and a hard stop (33 ′), respectively the said supports (16) and (17) are independent of each other. 10. The distribution device according to claim 1, characterized in that said first element (150) is provided with a concavity (157) facing the cliché roller (9).

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